Biology Study Guide

AP BIOLOGY
CELL UNIT
ACTIVITY #5

NAME_____________________
DATE___________HOUR_____

CELL TRANSPORT
MEMBRANE PROPERTIES

PASSIVE TRANSPORT
CHARACTERISTICS:
DIFFUSION:

Cell Unit Activity #5 page 1

OSMOSIS :
ISOTONIC

ANIMAL CELLS

Cell Unit Activity #5 page 2

HYPOTONIC

HYPERTONIC

PLANT CELLS

OSMOREGULATION – ADAPTATIONS
Paramecium

Fresh Water Bony Fish

FACILITATED D IFFUSION:

Cell Unit Activity #5 page 3

Marine Bony Fish

ACTIVE TRANSPORT
CHARACTERISTICS:
NA+/K+ PUMPS:

OTHER EXAMPLES :

Cell Unit Activity #5 page 4

COTRANSPO RT:

TRANSPORT OF LARGE MOLECULES :

Cell Unit Activity #5 page 5

TYPES OF ENDOCYTOSIS

PHAGOCYTOSIS

PINOCYTOSIS

RECEPTOR-MEDIATED
ENDOCYTOSIS

QUESTIONS:
1.

Use the key below to indicate how each class of materials is transported across the membrane.
A. Diffuses through the membrane.
B. Small enough to pass through the spaces between the phospholipid molecules. C. Requires the assistance of transport proteins.
______ Nonpolar materials

______ Water

______ Ions

______ Large polar uncharged molecules ______ Small polar uncharged molecules Cell Unit Activity #5 page 6

2.

What is the role of transport proteins in biological membranes?
_____________________________________________________________
_____________________________________________________________

3.

Describe how each of the following affect the rate of diffusion.
a.
b.

4.

Molecular size:____________________________________________
Temperature:_____________________________________________

A semipermeable sac, containing 4% NaCl, 9% glucose, and 10% albumin, is suspended in a solution with the following composition: 10% NaCl, 10% glucose, and 40% albumin. Assume the sac is permeable to all substances except albumin. Use the key provided to determine how each substance will move. ______ Glucose

A.

Moves into the sac

______ Albumin

B.